Reactive, nonreactive, and flash spark plasma sintering of Al2O3/SiC composites—A comparative study

The influence of different SPS‐based methods, that is, conventional spark plasma sintering (SPS), flash SPS (FSPS), and reactive SPS (RSPS) on the properties of Al2O3/SiC composite was investigated. It was shown that the application of preliminary high energy ball milling of the powders significantl...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2020-01, Vol.103 (1), p.520-530
Main Authors: Torosyan, Karen S., Sedegov, Alexey S., Kuskov, Kirill V., Abedi, Mohammad, Arkhipov, Dmitry I., Kiryukhantsev‐Korneev, Philipp V., Vorotilo, Stepan, Moskovskikh, Dmitry O., Mukasyan, Alexander S.
Format: Article
Language:English
Subjects:
alumina
Aluminum oxide
Ball milling
Ceramic powders
Ceramics
combustion synthesis
Comparative studies
Fracture toughness
mechanical activation
Mechanical properties
Modulus of elasticity
Plasma sintering
Refractory materials
Silicon carbide
Sinterability
Spark plasma sintering
Wear resistance
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Summary:The influence of different SPS‐based methods, that is, conventional spark plasma sintering (SPS), flash SPS (FSPS), and reactive SPS (RSPS) on the properties of Al2O3/SiC composite was investigated. It was shown that the application of preliminary high energy ball milling of the powders significantly enhances the sinterability of the ceramics. It was also demonstrated that FSPS provides unique conditions for rapid, that is, less than a minute, consolidation of refractory ceramics. The Al2O3‐20 wt% SiC composite produced by FSPS possesses the highest relative density (~99%), fracture toughness (7.5 MPa m1/2), hardness (20.3 GPa) and wear resistance among all ceramics produced by other SPS‐based approaches with dwelling time 10 minutes. The RSPS ceramics hold the highest Young's modulus (390 GPa). Substitution of micron‐sized Al2O3 particles by nano alumina does not lead to measurable enhancement of the mechanical properties.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.16734